SecureID - Computer Definition

A system involving a small, portable device generating a
one-time password at set
intervals (for example, one minute) and a software component on an access
device synchronized with this password-generation mechanism. A user gets access
to the system when he or she enters the password displayed on the portable
device. Carrying the portable device around (such as in the form of a key ring
attachment) is more comfortable than carrying a one-time password list, but it
serves the same purpose.